🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2006 Codes Chassis Code: GDB (Specific to WRX STI) Engine Code: EJ257 👋 Introduction Market Position Segment: Performance Compact Sedan/Wagon, Rally-Bred Sports Car Target Audience: Enthusiasts, Performance Drivers, DIY Mechanics, Professional Technicians Competitive Analysis Competitors 2006: Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Ford Focus SVT, Volkswagen GTI Key Features Vehicle Rally Heritage: Direct lineage from World Rally Championship (WRC) winning cars, emphasizing AWD grip and performance Dccd: Driver Controlled Center Differential (DCCD) for adjustable torque distribution, enhancing handling and traction Turbocharged Engine: High-performance turbocharged boxer engine known for its unique sound and power delivery Key Features Manual Authenticity: Represents genuine factory service information used by Subaru technicians Completeness: Covers all aspects of the vehicle, making it an indispensable resource for owners and mechanics alike Usability: Detailed illustrations, schematics, and step-by-step instructions facilitate accurate repairs and maintenance 📋 Manual Details Coverage Areas Primary Coverage: Complete Service, Repair, Maintenance, Troubleshooting, Diagnostics, Wiring Diagrams Secondary Coverage: Bodywork, Chassis, Electrical Systems, HVAC, Emissions Page Count Estimated Page Count: Approximately 2000+ Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Digital (Likely PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Engine Control System (ECU), Fuel System, Ignition System, Lubrication System, Cooling System, Exhaust System, Turbocharger System, Intercooler System Drivetrain: Manual Transmission (6-speed DCCD), All-Wheel Drive System (AWD), Center Differential (DCCD), Rear Differential, Driveshafts, Axles Suspension Steering: Front Suspension (MacPherson Strut), Rear Suspension (Multi-link), Power Steering System, Wheel Alignment Brakes: Front Brakes (Ventilated Discs, Brembo Calipers), Rear Brakes (Solid Discs), ABS (Anti-lock Braking System), Brake Fluid Specifications Electrical: Battery, Charging System, Starting System, Lighting System, Fuses, Relays, Instrumentation, ECU Pinouts, Wiring Diagrams for all systems Body Chassis: Body Panels, Doors, Hood, Trunk, Glass, Interior Trim, Chassis Components, Corrosion Protection Comfort Convenience: HVAC (Heating, Ventilation, Air Conditioning), Power Windows, Power Locks, Mirrors, Seats, Audio System Procedures Included Maintenance: Oil Change, Filter Replacements (Oil, Air, Fuel, Cabin), Spark Plug Replacement, Fluid Checks and Replenishments, Brake Pad Replacement, Belt Inspection and Replacement Diagnostics: Troubleshooting Common Issues, OBD-II Diagnostic Trouble Codes (DTCs), Sensor Testing, Actuator Testing, Performance Diagnosis Repair Rebuild: Engine Overhaul, Transmission Rebuild, Turbocharger Rebuild, Brake System Repair, Suspension Component Replacement, Electrical Component Repair Installation Adjustment: Timing Belt Replacement, Clutch Replacement, Suspension Geometry Adjustment, Wheel Alignment Procedures, Turbocharger Installation/Removal Technical Depth Depth: Comprehensive (from basic maintenance to full engine and transmission rebuilds, including detailed torque specifications and diagnostic procedures) 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Print Quality Quality: High-resolution scans of original factory documentation, ensuring clarity of text and diagrams Binding Type Binding: N/A (Digital) Paper Type Paper Type: N/A (Digital) Searchability Search Functionality: Likely text-searchable PDF, allowing quick access to specific information Navigation Navigation Features: Bookmarked sections, clickable links within the PDF for easy navigation between topics and diagrams ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally Opposed (Boxer), Turbocharged, Intercooled, DOHC, 16-valve Displacement: 2.5 Liters (2457 cc) Bore X Stroke: 99.5 mm x 80.0 mm Compression Ratio: 8.4:1 Engine Management: Subaru Engine Control Unit (ECU), Electronic Fuel Injection (EFI) Performance Horsepower: 300 PS (296 bhp / 221 kW) @ 6400 rpm (European/JDM spec, US spec slightly lower) Torque: 392 Nm (289 lb-ft) @ 4400 rpm (European/JDM spec, US spec slightly lower) Redline: 7500 rpm Fuel System Fuel Type: Unleaded Gasoline (91 Octane or higher recommended) Fuel Delivery: Sequential Electronic Fuel Injection (SEFI) Fuel Pump: High-pressure electric fuel pump Maintenance Specs Oil Type: SAE 5W-30 Synthetic (Refer to manual for exact specifications and approvals) Oil Capacity: 4.8 US quarts (4.5 liters) with filter change Spark Plugs: Iridium type, specific part numbers in manual (e.g., NGK PFR7B or equivalent) Timing Belt: Timing belt driven, replacement interval typically 105,000 miles or 7 years (refer to manual) Coolant Type: Subaru Super Coolant (Blue) or equivalent silicate-free ethylene glycol coolant 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission with Driver Controlled Center Differential (DCCD) Optional Optional Transmission: N/A (Only manual transmission offered for STI) Features Dccd Modes: Manual mode (driver adjustable center diff lockup) and Auto mode (ECU controlled) Gear Ratios: Specific ratios provided in the manual for each gear and final drive Maintenance Specs Transmission Fluid Type: Hypoid Gear Oil, API GL-5 (e.g., Subaru Extra-S or equivalent) Transmission Fluid Capacity: Approximately 3.5 liters (Manual transmission) Rear Differential Fluid Type: Hypoid Gear Oil, API GL-5 (e.g., Subaru Extra-S or equivalent) Rear Differential Fluid Capacity: Approximately 1.0 liter 📐 Dimensions Exterior Length: 4415 mm (173.8 in) Width: 1770 mm (69.7 in) Height: 1440 mm (56.7 in) Wheelbase: 2625 mm (103.3 in) Track Width Front: 1530 mm (60.2 in) Track Width Rear: 1535 mm (60.4 in) Ground Clearance: 140 mm (5.5 in) Weights Curb Weight: Approximately 1500 kg (3307 lbs) Gross Vehicle Weight Rating: N/A (Refer to vehicle placard) Wheels Tires Wheel Size:...